Apple announced that Maroon 5, Pharrell Williams, Beck, Sam Smith, Blondie, Kylie, David Guetta, 5 Seconds of Summer, Calvin Harris, Chrissie Hynde and many more of the world's biggest artists will be headlining this year's iTunes Festival. Returning to the UK for an eighth year―following a week of incredible live performances in March at SXSW―the iTunes Festival will feature over 60 acts throughout September at the legendary Roundhouse. iTunes performances can be watched live or on-demand by millions of iOS users around the world on their iPhone, iPad or iPod touch and iTunes on their computer or in stunning HD with Apple TV. Tickets are free for competition winners only.

"The iTunes Festival in London is back with another stunning line-up of world class performers and tremendous new acts," said Eddy Cue, Apple's senior vice president of Internet Software and Services. "These live shows capture the heart and soul of iTunes and we love bringing them to our customers in the Roundhouse, as well as to the millions of people watching all over the world for free."